...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of earthquake engineering >Performance evaluation of a shallow foundation built on structured clays under seismic loading
【24h】

Performance evaluation of a shallow foundation built on structured clays under seismic loading

机译：地震作用下基于结构性粘土的浅层地基性能评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Due to the increased need of storage, larger and higher structures are being built all over the world, thus requiring a more careful evaluation of the mechanical performance of their foundation deposits both in terms of bearing capacity and compressibility behaviour. The design of such structures and their serviceability and stability is largely governed by the effects of the dynamic loading conditions principally because of their significantly elevated risk in seismic prone zones. In this paper, numerical analyses using an advanced constitutive model, able to account for the initial soil structure and its progressive degradation, have been performed to investigate the seismic response of a silo foundation built on structured clays. The proposed analyses involve the use of a fully-coupled finite element approach. For the dynamic simulations, three different input motions have been selected form earthquake databases according to the seismic hazard study of the specific site. The results of the silo dynamic response are illustrated in terms of signal amplification, permanent excess porewater pressures, accumulated displacements and structure induced degradation during and after the seismic loading. The dynamic behaviour of the footing indicates that extreme earthquake events can induce large destructuration in natural clays, leading to ground settlements up to twice the observed ones under static loads, which need to be properly accounted for in the design. This suggests that there are significant advantages in using advanced models which recognise the existence of initial soil structure and its subsequent damage due to the applied dynamic loads.
机译：由于越来越多的存储需求，世界各地都在建造更大，更高的结构，因此需要就承载力和可压缩性方面更仔细地评估其基础沉积物的机械性能。这种结构的设计及其可使用性和稳定性在很大程度上受动态载荷条件的影响，这主要是因为它们在地震多发区的风险显着提高。在本文中，已经进行了使用高级本构模型的数值分析，该模型能够解释初始土壤结构及其逐步退化，以研究基于结构粘土的筒仓地基的地震反应。提出的分析涉及使用全耦合有限元方法。对于动态模拟，根据特定地点的地震危害研究，从地震数据库中选择了三种不同的输入运动。筒仓动力响应的结果以信号放大，永久性超孔隙水压力，累积位移和地震荷载作用期间和之后的结构引起的退化为例进行说明。立足点的动态行为表明，极端地震事件可能会导致天然粘土中的大破坏，从而导致地面沉降在静态载荷下达到观察到的两倍，这需要在设计中加以适当考虑。这表明使用高级模型具有明显的优势，该模型可以识别初始土壤结构的存在及其由于施加的动态载荷而造成的后续破坏。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号